Try this for photos. It's quick, easy, free, and it works: Post Photos on NitroExpress

I can't see your photo from the previous post, but a Mannlicher Schoenauer marked 'Steyr 1905' on the side rail is not an M1905. It is, as you suspect, a military model - a 'Greek Contract' Y1903/05 and as such was originally chambered for 6.5X54MS.

Here is a somewhat lengthy post I sent to another 'site not long ago that will explain. It was a reply to a member with a Breda MS, but read through for a description of the 'Greek' MS models and their markings: Greek MS

Reading through it, I noticed omission of the M1908 (8X56) in my list of pre - WW2 MS sporting arms of the MS proprietary chamberings.
They were,
M1900
M1903 - 6.5X54

M1905 - 9X56

M1908 - 8X56

M1910 - 9.5X57 a.k.a. .375 Nitro Express Rimless 2.25"